| 摘要 |
<p>A microwave coupler device of planar circuit form, similar in form to a conventional branch arm coupler in that it comprises a substrate (23) having a ground plane conductor on one main face and an electrically conductive pattern on the other main face comprising a central portion (25) and four strip portions (27, 29, 31, 33) extending therefrom, but in which the central portion, instead of comprising four limbs in a rectangular configuration, is in the form of a rectangle with the strip portions extending from positions adjacent the corners of the rectangle.</p> |
